Hardware setup
Use the ESPPROG adapter with a micro USB cable and the 6 pin flat ribbon cable
Ribbon cable orientation
make sure the ESPPROG is not supplying any power i.e disconnect the jumper.
Software setup
The ESP32 can be flashed over the air or using a serial to USB adapter.
Visual studio setup:
Setup visual studio,
Clone gitub repo to workspace
Download Git Bash for windows
Cd into the folder “crs-wifi-car-firmware”
“git submodule update --init --recursive” this downloads the ESP-IDF
“source ./install.sh” install relevant tools
Done
\uD83D\uDCD8 Instructions for serial adapter
Power up the car while pushing down the “BOOT“ button
Open visual code and click on “ESP-IDF Flash device”
🤖 Hardware design for the serial flash tool
The PCB has no onboard debugger of flash hardware, we will instead use an https://ftdichip.com/products/ttl-232r-3v3/ which we can share between the platforms. This is a simple USB to serial converter using 3.3V
The only hardware we need on the PCB is a button connected to the GPIO0.
Read more at https://github.com/espressif/esptool/wiki/ESP32-Boot-Mode-Selection
Simple example circuit:
Pinout of the FTDI:
https://docs.rs-online.com/588e/0900766b80d4cba6.pdf
Boot mode select
...
https://github.com/espressif/esptool#entering-the-bootloader
\uD83D\uDCCB Related articles
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